In total, it saw an operating surplus of $41.5 million on revenue of $905.1 million in the six-month period compared with an operating surplus of $19.2 million on revenue of $808.1 million in the first half of fiscal 2014.

However, losses on its investments dragged down the system's bottom line. Its net surplus was only $27.5 million, compared with the comparable 2014 period's $71.7 million.

The financial statement did not include utilization statistics.

WellStar and Atlanta-based Emory announced Monday that they intend to merge their hospitals and post-acute-care assets under a single umbrella. The parties are in a 45-day public discussion period and will then formalize the concept over the following 12 months.